Hi Jerry-ch Chen, On 2/20/19 8:48 AM, Jerry-ch Chen wrote: > Hello, > > This is the first version of the RFC patch series adding Face Detection > (FD) driver on Mediatek mt8183 SoC, which will be used in camera features > on CrOS application. It belongs to the first Mediatek's camera driver > series based on V4L2 and media controller framework. I posted the main part > of the FD driver as RFC to discuss first and would like some review > comments on the overall structure of the driver. > > Face Detection (FD) unit provide hardware accelerated face detection > feature. It can detect different sizes of faces in a given image. > Furthermore, it has the capability to detect the faces of Rotation-in-Plane > from -180 to +180 degrees and Rotation-off-Plane from -90 to +90 degrees. > > The driver is implemented with V4L2 and media controller framework. We have > the following entities describing the FD path. Just a high-level comment before you post the next version of this series: Please compile the latest version of v4l2-compliance (part of git://linuxtv.org/v4l-utils.git) and run it against your driver: v4l2-compliance -m /dev/mediaX Whenever you post a new version of this series, please do a 'git pull' of the v4l-utils repo, recompile and retest with v4l2-compliance and post the test results in the cover letter. Obviously, there should be no FAILs and probably no warnings. I suspect that streaming (e.g. adding the -s10 option to v4l2-compliance) probably won't work since v4l2-compliance doesn't know about the meta data formats. Regards, Hans > > 1. Meta input (output video device): connects to FD sub device. It accepts > the input parameter buffer from userspace. The metadata interface used > currently is only a temporary solution to kick off driver development > and is not ready for reviewed yet. > > 2. RAW (output video device): connects to FD sub device. It accepts input > image buffer from userspace. > > 3. FD (sub device): connects to Meta output. When processing an image, > FD hardware only returns the statistics of detected faces so it needs > only one capture video devices to return the streaming data to the user. > > 4. Meta output (capture video device): Return the result of detected faces > as metadata output. > > The overall file structure of the FD driver is as following: > > * mtk_fd-dev-ctx-core.c: Implements common software flow of FD driver. > * mtk_fd-v4l2.c: Static FD contexts configuration. > * mtk_fd.c: Controls the hardware flow. > * mtk_fd-dev.c: Implements context-independent flow. > * mtk_fd-ctrl.c: Handles the HW ctrl request from userspace. > * mtk_fd-smem-drv.c: Provides the shared memory management required > operation. We reserved a memory region for the co-processor and FD to > exchange the hardware configuration data. > * mtk_fd-v4l2-util.c: Implements V4L2 and vb2 ops. > > Jerry-ch Chen (7): > dt-bindings: mt8183: Add binding for FD shared memory > dts: arm64: mt8183: Add FD shared memory node > dt-bindings: mt8183: Added FD-SMEM dt-bindings > dt-bindings: mt8183: Added FD dt-bindings > dts: arm64: mt8183: Add FD nodes > media: platform: Add Mediatek FD driver KConfig > platform: mtk-isp: Add Mediatek FD driver > > .../devicetree/bindings/media/mediatek,fd_smem.txt | 28 + > .../bindings/media/mediatek,mt8183-fd.txt | 30 + > .../mediatek,reserve-memory-fd_smem.txt | 44 + > arch/arm64/boot/dts/mediatek/mt8183.dtsi | 28 + > drivers/media/platform/Kconfig | 2 + > drivers/media/platform/mtk-isp/Kconfig | 10 + > drivers/media/platform/mtk-isp/Makefile | 16 + > drivers/media/platform/mtk-isp/fd/Makefile | 38 + > drivers/media/platform/mtk-isp/fd/mtk_fd-core.h | 157 +++ > drivers/media/platform/mtk-isp/fd/mtk_fd-ctx.h | 299 ++++++ > .../platform/mtk-isp/fd/mtk_fd-dev-ctx-core.c | 917 +++++++++++++++++ > drivers/media/platform/mtk-isp/fd/mtk_fd-dev.c | 355 +++++++ > drivers/media/platform/mtk-isp/fd/mtk_fd-dev.h | 198 ++++ > .../media/platform/mtk-isp/fd/mtk_fd-smem-drv.c | 452 +++++++++ > drivers/media/platform/mtk-isp/fd/mtk_fd-smem.h | 25 + > .../media/platform/mtk-isp/fd/mtk_fd-v4l2-util.c | 1046 ++++++++++++++++++++ > drivers/media/platform/mtk-isp/fd/mtk_fd-v4l2.c | 115 +++ > drivers/media/platform/mtk-isp/fd/mtk_fd-v4l2.h | 36 + > drivers/media/platform/mtk-isp/fd/mtk_fd.c | 730 ++++++++++++++ > drivers/media/platform/mtk-isp/fd/mtk_fd.h | 127 +++ > 20 files changed, 4653 insertions(+) > create mode 100644 Documentation/devicetree/bindings/media/mediatek,fd_smem.txt > create mode 100644 Documentation/devicetree/bindings/media/mediatek,mt8183-fd.txt > create mode 100644 Documentation/devicetree/bindings/reserved-memory/mediatek,reserve-memory-fd_smem.txt > create mode 100644 drivers/media/platform/mtk-isp/Kconfig > create mode 100644 drivers/media/platform/mtk-isp/Makefile > create mode 100644 drivers/media/platform/mtk-isp/fd/Makefile > create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-core.h > create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-ctx.h > create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-dev-ctx-core.c > create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-dev.c > create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-dev.h > create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-smem-drv.c > create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-smem.h > create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-v4l2-util.c > create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-v4l2.c > create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-v4l2.h > create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd.c > create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd.h >
